/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.mycompany.fb.visualization;

import static com.mycompany.fb.visualization.AuthorizationServlet.appId;
import static com.mycompany.fb.visualization.AuthorizationServlet.appURL;
import com.restfb.types.Page;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author Mato
 */
@WebServlet(name = "AuthorizationServlet", urlPatterns = {"/AuthorizationServlet", "/fbvisualization"})
public class AuthorizationServlet extends HttpServlet {
    
    public static final String appId = "427183367377977";
    public static final String appSecret = "1f59c7209ebebc56bcfda95510886d70";
    public static final String appURL = "http://localhost:8080/FB-visualization/LoginServlet";
    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        fbAuthorization(request, response);
 
    }
    
    /**
     * 
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */ 
    private void fbAuthorization(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
    {
        
        String fbAuthorization = "https://www.facebook.com/dialog/oauth?client_id=" + appId + "&redirect_uri=" + appURL + "&state=" +  "&scope=friends_hometown, friends_location, friends_birthday, friends_groups, friends_likes, friends_interests, friends_photos, read_stream"; 
        System.out.println(fbAuthorization);
        response.sendRedirect(fbAuthorization);
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
